Very Large Eddy Simulation of Cavitation from Inception to Sheet/Cloud Regimes by A Multiscale Model  

作　　者：LI Lin-min WANG Zheng-dong LI Xiao-jun WANG Yan-ping ZHU Zu-chao 

机构地区：[1]National-Provincial Joint Engineering Laboratory for Fluid Transmission System Technology,Zhejiang Sci-Tech University,Hangzhou 310018,China

出　　处：《China Ocean Engineering》2021年第3期361-371,共11页中国海洋工程（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Grant Nos.52006197 and 51676174);the Natural Science Foundation of Jiangsu Province(Grant No.BK20180505);the National Science Foundation of Zhejiang Province(Grant Nos.LQ21E060012 and LR20E090001);the Key Research and Development Program of Zhejiang Province(Grant No.2020C01027)。

摘　　要：The cavitating flow in different regimes has the intricate flow structure with multiple time and space scales.The present work develops a multiscale model by coupling the volume of fluid(VOF)method and a discrete bubble model(DBM),to simulate the cavitating flow in a convergent-divergent test section.The Schnerr-Sauer cavitation model is used to calculate the mass transfer rate to obtain the macroscale phase structure,and the simplified Rayleigh-Plesset equation is applied to simulate the growing and collapsing of discrete bubbles.An algorithm for bridging between the macroscale cavities and microscale bubbles is also developed to achieve the multiscale simulation.For the flow field,the very large eddy simulation(VLES)approach is applied.Conditions from inception to sheet/cloud cavitation regimes are taken into account and simulations are conducted.Compared with the experimental observations,it is shown that the cavitation inception,bubble clouds formation and glass cavity generation are all well represented,indicating that the proposed VOF-DBM model is a promising approach to accurately and comprehensively reveal the multiscale phase field induced by cavitation.

关 键 词：cavitating flow multiscale model volume of fluid discrete bubble model VLES 

分 类 号：O35[理学—流体力学]